Is (x + 1) a factor of

f (x) = x3 + 2x2 - 5x - 6?

Yes

No

Yes

Step-by-step explanation:

If x + 1 is a factor

x = - 1 should be a root

Check for the remainder:

(-1) ³ + 2 (-1) ² - 5 (-1) - 6

0

Therefore it's a root, hence x+1 is a factor

Yes.

Step-by-step explanation:

You can find it out by factoring but ill do it easier way.

(x + 1) = 0 put the first and second equation to 0

x = - 1

x³ + 2x² - 5x - 6 = 0 Now plug in the x in the equation

(-1) ³ + 2 (-1) ² - 5 (-1) - 6 = 0

0 = 0

so (x + 1) is a factor.